{"nhtsa_id":10171861,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-03-03","date":"2020-02-05","document_id":"TSB 20-2034","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:LPG SYSTEMS:WATER HEATER; SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER","mfr_system":null,"summary":"Some 2015-2019 F-150 vehicles equipped with a 3.3L, 3.5L Duratec, 3.5L EcoBoost and 5.0L engine and equipped with a block heater built on or before 1-Jan-2019 may exhibit a lack of heat concern from the heating ventilation and air conditioning (HVAC) system when operating the vehicle consistently in temperatures that are below -20Å’C (4Å’F). This condition may be due to deposits from the engine coolant becoming trapped in the heater core. To correct the condition, flush the cooling system and replace the heater core.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171861-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171861-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171861","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"seats","name":"Seats","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-150","year_from":2015,"year_to":2019,"match":"exact","vehicle_ids":["2015_ford_f-150","2016_ford_f-150","2017_ford_f-150","2018_ford_f-150","2019_ford_f-150"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}